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dc.creatorStruck, C. W.en_US
dc.creatorFonger, W. H.en_US
dc.date.accessioned2006-06-15T13:21:12Z
dc.date.available2006-06-15T13:21:12Z
dc.date.issued1970en_US
dc.identifier1970-S-2en_US
dc.identifier.urihttp://hdl.handle.net/1811/8527
dc.description$^{1}$Struck, C. W. and Fonger, W. H., Electrochemical Society Extended Abstracts, Spring Meeting, Los Angeles, California, May 10--15, 1970 (The Electrochemical Society, New York, 1970) p. 119.""en_US
dc.descriptionAuthor Institution: RCA Laboratoriesen_US
dc.description.abstractExcitation into the $Eu^{+2}$ charge-transfer states (CTS) in $Y_{2} O_{2} S$ and $La_{2} O_{2} S$ leads partially to long-time energy storage or to loss, in addition to feeding the emitting $^{3} D$ states. We have explained both storage and loss as commencing with the dissociation of the $Eu^{+3}$ CTS into $Eu^{+2}$ and a free $hole.^{1}$ The amount of storage produced and also the rise-time transient response to excitation are both measures of CTS dissociation and give activation energies for dissociation of $1200 cm^{-1}$ in $Y_{2} O_{2}S, 1500 cm^{-1}$ in $La_{2} O_{2}S$. At room temperature, 1/5 of $La_{2} O_{2} S$ CTS excitations and 2/5 of $Y_{2} O_{2} S$ excitations dissociate. Losses prominent at high $Eu^{+3}$ content produce non-linearities, which are interpreted as showing that the loss is proportional to the product of $Eu^{+2}$ and trapped hole concentrations. We believe that the losses are due to the extra electrons at the $Eu^{+2}$ centers migrating through the Eu activators and recombining non-radiatively at the hole centers.en_US
dc.format.extent99810 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleDISSOCIATION OF THE $Eu^{+2}$ CHARGE-TRANSFER STATE INTO $Eu^{+2}$ AND A FREE HOLE IN Y AND La OXYSULFIDESen_US
dc.typearticleen_US


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